Series of Lenses combining functions of Focusing the Laser Heating beam and spectroradiometric temperature measurements
With these unique achromatic lenses it is possible to focus the radiation of IR-laser beam used for heating of a sample and, simultaneously, create the image of that sample for further analyzing with using a spectrometer or other instrumerits.
Diffraction limited correction level for both optical paths: laser heating and temperature measurements.
Optimized operation spectral bands:
Example of imaging layout, magnification -12.5

Comparison of Chromatic Focal Shift Lens from Fused Silica

geoHEAT

| Model | 100_NIR | 60_VIS | 100_VIS |
| Type | Achromatic lenses | ||
| Input Clear Aperture | 19 mm | ||
| Focal Length, mm (at 1064 nm) | 102.0 | 61.6 | 99.1 |
| Working Distance, mm (from last mechanical surface to Focus) | 92.0 | 57.0 | 88.0 |
| F Number | 5.4 | 3.2 | 5.2 |
| Overall Dimensions | 30 / 17.5 | 30 / 25.5 | 30 / 17.5 |
| Optimum spectral range, nm | 600 - 900, 1020 - 1100 | 400 - 700, 1020 - 1100 | |
| Other features |
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| Applications | Laser Heating in studies of physical properties of materials (for example, minerals) under high pressure and high temperature in combination with spectroradiometric temperature measurements. | ||
| Mounting | External Thread M27x1 (M24x1 for modification of geoHEAT 100_NIR) | ||
| Weight | < 100 g | ||